Locking device for doors of baling presses



0d. 13, 1931. JACOBSON ET 1,826,936

LOCKING DEVICE FOR DOORS 0F BALING PRESS ES Filed April 12, 1928 2 Sheets-Sheet 1 EEL- Z4 Z2, 24, z 33 27 i z9 25 la I N VEN TOR.

m ZQM A TTORNE Y.

Oct. 13, 1931. H. JACOBSON ETAL LOCKING DEVICE FOR DOORS OF BALING PRESSES Filed April 12, 1928 '2 Sheets-Shout 2 INVENTOR BY K ,i m'q am ATTORNEY.

Patented Oct. 13, 1931 UNETEDSTATES PATENT OFFICE.

HENRY JAGOBSON AND KARL AICHELEN, OIE MILV/AUKEE, VJISCONSIN LOCKING DEVICE FOR DOCRS OF BALING PRESSES Application filed April 12,

the doors are free to fly open under the pressure created by the resiliency of the compacted bale and this presents a dangerous situation for the operator, who be seriously injured if struck by one of the doors. The object of our invent-ion is to prevent liability of injury as above recited by providing a door-locking mechanism which in addition to holding the doors securely locked during the compression of the bale will also permit a gradual and positively con rolled opening of the doors so that the locks will not be released until the natural ire-expansion of the bale has spent itself.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclu sion hereof,

In the drawings Fig. 1 is a side elevation view of a baling press equipped with alooking device embodying the invention, parts being broken away;

Fig. 2 is a front elevational view of the press parts being broken away;

Fig. 3 is a section taken on the line 3--3 of Fig. 1;

Fig. i is an enlarged side elevational view of the press box, parts being shown in sec tion; I

Fig. 5 isa detail sectional view taken on the line 5-5 of Fig. 3.

The locking device has been shown in (onnection wi h one form of baling press. such as is used for baling scrap paper, in which the numeral 6 designates the press box, 7 the pressingram. 8 the movable top cover, and 9 the doors of the press box. The ram 7 is here shown as hyoraulically operated and the box extends to a position above the floor 10, the cover 8 being mounted on a carriage 11 provided with wheels 12 movaole on rails 13, the cover being moved to one side. as shown in 2 during the charging of the box and then moved over the top of the box 1928. Serial No. 269,375.

and held in this position in known manner during the pressing operation.

The doors 9 of the press box are here shown as forming three sides of that portion of the box that holds the completed bale but f it will be understood that the locking device hereinafter describes may be used on other door arrangements. As shown these doors are hinged to the rear side of the press box on vertically disposed hinge pintles 1% and are provided with lock-en aging lugs 15.

The locking mechanism includes a pair of locking members 16 and means under the control of the operator for moving said members to looking or releasing position. said means holding said members in any inter mediate position. These members are shown as a pair of oppositely disposed bell crank levers having spaced arms 17 engageable with the lugs of the adjacent door d medially disposed arm 18, each of said levers being mounted on a pivot shaft 19 carried in a frame member 20 secured to the supporting frame 21 of the press box.

' The arm 18 of each lever is connected by a pivot bolt 22 and a pair of toggle links 23 to bolt 01: pivot projections 24 formed on a collar 25 in which a threaded nut 26 is mounted. An operator controlled, lock operating, threaded shaft27 is journalled at one end in a bearing 28 in the frame member 20 and in abearing 29 in the arms 30 of said frame with a thrust collar 31 associated with said bearing, the extended end 32 of said shaft having: a handwheel 33 securely fastened thereto for the purpose of turning said shaft.

iVith this construction the doors are closed and locked before charging. the turning of the shaft 27 in a clockwise direction serving to move the nut 26 toward the box and thus. through the links 23.. swinging thelevers 16 inwardly against the lugs 15 to hold the doors closed. After the bale has been compressed the turning of the shaft 27 in the opposite direction gradually swine-s the levers 16 outwardly toward the dotted line position shown in Fig. 3 and this turningmay be done inter mitfentlv that the re t ansion of the bale. as? he doors are opened, may spend itself before the locking members are actually relUt leased from the doors, since the travel of the doors relative to said locking member or 1ev er permits said member to remain in controlled engagement with the doors for a con- 3 siderable part of their opening movement. Thus, as the doors are at all times, even though in a partially open position, looked against free movement any danger of injury to the operator from a free movement of the door, under the action of the expanding bale,

is prevented.

We desire it to be understood that this invention is not to be limited to any specific form or arrangement of parts except insofar as such limitations are specified in the claims.

What we claim as our invention is:

1. In a balino' press, the combination'with apress box havin; a pair of movable doors, of'loeking mechanism for said doors comprisflbing a pair of locking members engageable with said doors. and self-locking-means independent of said doors for positively actuating said locking members whereby to hold said doors closed and to restrain the free i opening movement of said doors duringtheir opening movement.

2. In a bailing press, the combination with a press box having a pair of pivoted doors forming the sides and one end of the delivery i end of said press box. of a pair of locking levers engageable with saiddoors, a screw shaft, a nut, means operatively connecting said-nut with said levers to swing said levers I onthe-movement of saidnut upon said shaft, and means, under the control of the operator, i 'for turning said shaft.

3; In a bailing press, the combination with a' pl'essbox having a pair of pivoted doors forming the sides and one end'of the delivery end of said press box. of a pair; of locking levers 'engageable with said doors. a screw shaft, a nut mounted on said shaft. means-ineluding toggle links operativelv connecting said nut with said levers. and meansunder the control of the operator for turning said shaft.

4. In a baling press. the combination'w-ith aq press box having a pair of pivoted doors forming the sides and one end of the delivery -5 end of said press box. of apair of bell'c'rank levers. each having spaced arms en'gageable withthe adjacent door and a centrally disposed arm. a screw shaft. means including links operativelv connecting said centrally disposed arms to said shaft, and means for turning said shaft.

5. In a baling press, the combination with a press box having a pair of pivoted doors forming the sides and one end ofthe delivery end of said press box, locking mechanism'for said doors comprising a pair of pivoted levers engageable with adjacent parts ofthe doors, and means for positively moving said locking levers to secure the doors in closed position and to maintain said levers in operative engagement with said doors on the o ening movement of said doors to prevent t eir free opening movement under the expansive action of the bale.

In testimony whereof, we aiiix our sig- 7e natures.

HENRY JACOBS ON. KARL AJCHELEN. 

